Jiangsu Haifa Machinery Manufacturing Co., Ltd.

Title: High-Temperature Magnetic Drive Process Pump for Nitric Acid  
Core Event: In February 2025, our company officially launched a high-temperature magnetic drive process pump specifically designed for nitric acid. This product targets chemical enterprise users and is engineered for nitric acid production, transportation, and high-temperature conditions, aiming to address the pain points of traditional pumps prone to leakage and high maintenance costs in strong corrosive and high-temperature environments.

Background and User Pain Points: Nitric acid, as a strong oxidizing acid, is often accompanied by high temperatures (e.g., 120°C-180°C) in chemical production. Traditional mechanical seal pumps, after prolonged operation, are susceptible to seal corrosion or failure due to thermal stress, leading to media leakage. This not only increases downtime and maintenance costs but also poses safety risks. User feedback indicates that over the past three years, some factories experienced an average of 2 unplanned shutdowns per month due to pump leakage, with each repair taking over 8 hours.

Product Design and Core Features: This pump adopts a fully magnetic drive structure, completely eliminating dynamic sealing points and fundamentally preventing leakage risks. The pump body and flow-wetted components are made of high-silicon stainless steel and PTFE lining. Laboratory tests show that under 65% concentration and 150°C, the pump operates continuously for 1000 hours without corrosion thinning.

For enterprise users, the product is equipped with a built-in temperature monitoring module (national patent number ZL2024XXXXXX). When the pump cavity temperature exceeds a set threshold (e.g., 160°C), it automatically triggers an alarm and coordinates with the control system to reduce frequency operation, preventing dry running or overheating damage.

Additionally, the pump's leak-free design complies with the latest environmental regulations (GB/T 37836-2024), reducing environmental compliance risks for enterprises.

Usage Steps and Common Problem Solutions:  

1. Pre-installation Check: Ensure the flange sealing surfaces of the pump inlet and outlet pipes are flat to avoid deformation caused by installation stress.




2. Startup Operation: First open the inlet valve to ensure the pump cavity is filled with media, then start the motor. Dry running is strictly prohibited to avoid the risk of magnet demagnetization.




3. Temperature Management: If the alarm is triggered, immediately check the cooling system (e.g., whether the jacket cooling water flow rate is below 1m³/h). In 2024, a chemical enterprise resolved a pump temperature over-limit issue caused by a blocked cooling water pipe by following this procedure.




4. Regular Maintenance: Check the isolation sleeve wear every 200 hours of operation; replace it if the thickness reduction exceeds 0.5mm.




5. Common Issue: User feedback of "high vibration after startup" is often due to insufficient pipe support or gas in the media. Solution: Reinforce pipe supports and install an exhaust valve on the inlet pipe.

Significance and Company Statement: This product entered mass production in March 2025, with the first batch of orders delivered to three nitric acid production enterprises in East China. Real-world data shows that during 180 days of continuous operation the pump's maintenance interval extended to 6000 hours, a 200% improvement over traditional pumps. The company plans to launch an upgraded model capable of withstanding higher temperatures (200°C) in the fourth quarter of 2025, along with free remote debugging services, which users can apply for via the official website.

Editor's Note: This article is compiled based on our company's product R&D data and user feedback, intended for reference by chemical enterprise equipment procurement and maintenance personnel. All data in the article comes from internal test reports and customer follow-up records.

Jiangsu Haifa Machinery Manufacturing Co., Ltd. was restructured from Jiangsu Ligong Group Co., Ltd., founded in 1958, and the Jingjiang Stainless Steel Pump and Valve Factory of the Steel Research Institute of the Ministry of Metallurgical Industry. It primarily produces API610 chemical process pumps—OH1, OH2, OH3, OH4 pumps; BB1~BB5 multi-stage pumps; VS1~VS6 barrel pumps; HES chemical process pumps; sixth-generation ultra-low carbon stainless steel high-quality leak-proof molten urea pumps; urea hydrolyzer feed pumps; high-temperature asphalt pumps; pitot tube pumps; rotary jet pumps; molten salt pumps; submersible pumps; high-temperature nitric acid magnetic drive pumps magnetic drive pumps for solid-containing media; industrial pumps; canned motor pumps; slurry pumps; titanium tetrachloride pumps; self-priming pumps; lined fluorine pumps; leak-proof pumps; alkali pumps; axial flow pumps; long-shaft submersible pumps; CQC first-level energy-efficient chemical pumps; and high-pressure descaling industrial pumps. www.jslgpump.com Contact: 13905263417 E-mail: jslgpump@gmail.com E-mail: jsareva@163.com